Note 4 - Investments Available for Sale (Tables)

6 Months Ended

Jun. 30, 2012

Available-for-sale Securities [Table Text Block]

	December 31, 2011
Corporate Notes and Bonds	$	2,024
Accrued interest income		33
Total investments available for sale	$	2,057

Unrealized Gain (Loss) on Investments [Table Text Block]

	June 30, 2011
Gross unrealized holding gains	$	24
Gross unrealized holding losses		2

Schedule of Comprehensive Income (Loss) [Table Text Block]

	Six Months Ended June 30,					Three Months Ended June 30,
	2012		2011			2012		2011
Increase/(decrease) in comprehensive income	$	2	$	(45	)	$	0	$	(33	)

Realized Gains And Proceeds From Sale Of Investments [Table Text Block]

	Six Months Ended June 30,				Three Months Ended June 30,
	2012		2011		2012		2011
Proceeds from sale of investments	$	1,013	$	23,812	$	0	$	12,853
Realized gain on sale of investments		0		12		0		6